Adding machine frame construction



6. 1926 'r sheets-sheet 1 Feb. 27, 1934. R. c. coxHEAD m- AL ADDING MACHINE FRAME CONSTRUCTION Original Filed Aug. 2

Feb. 27, 1934. R. COXHEAD ET AL 1,948,958

ADDING MACHINE FRAME CONSTRUCTION Original Filed Aug. 26, 1926 '7 Sheets-Sheet 2' Mm A ORNEYS R. C. COXHEAD ET AL ADDING MACHINE FRAME CONSTRUCTION '7 Sheets-Sheet 3 Original Filed Aug. 26, 1926 d@ S00 5MM T X 0 N www. VWXT .N m@ m M c .2mg d u ma m .w N. A N- @kw ,.Wvvp, E S 0 @WWW NMNQN! Q #www mbv. -..M .Q N3 wl/ MI r n N o o |1 AN w Q u@ uw w; I .NQ 0.2,@ NNW N A@ KN n Nm. .n .NGN

@WN NoN MN 7 Sheets-Sheet 4 Feb. 27, 1934. R. c. coxHEAD Er AL f 1,948,958

ADDING MACHINE FRAME CONSTRUCTION original Filed Aug. 2e. 192e 7 sheets-sheet 5 Feb. 27, 1934. R. c. coxHEAD ET AL 1,943,958

.ADDING MACHINE FRAME CONSTRUCTION 1926 '7 Sheets-Sheet 6 d@ rm www m j Nn mKWxR wim o Sm. A Nw NNN.

Original Filed Aug. 26,

Feb. 27, 1934. R. c. cxHEAD ET AL ADDING MACHIIGE FRAME CONSTRUCTION 7 Sheets-Sheet '7 Original Filed Aug. 25. 1926 Patented Feb. 27, 1934 ADDING MACHINE FRAME CONSTRUCTION Ralph C. Coxhead, New York, N. Y., and Charles- W. Norton, Stratford, Conn.. asaignors, by mesne assignments, to Brunsviga Maschinenwerke Grimme Natalie & Co. A. G., Brunswick,

Germany Original application August 26, 1926, Serial No.

131,797. Divided and 1930. Serial No. 448.257

y 6 Claims.

QThe objects of this invention brieily stated To construct an adding machine provided with a full keyboard, automatic cipher cut-out, printing mechanism, total, sub-total, repeat, error, and non-add keys of a size heretofore considered impracticable because of the small size.

Another object of the invention is the construction of anovel full keyboard of a size heretofore considered impractically small and yet free from the defect of depressing plural keys.

Another object of this invention is to preserve and in some instances to materially increase the strength of all parts subject to torsional, transverse, or compressive stress during the operation or the machine.

Another object of this invention is to provide new and novel means for permitting the construction of the machine in a number of separate` sub-assemblies so that when the said sub-assemblies are properly joined together with a minimum of connections the machine is completely assembled.

Another object of this invention is to utilize a type of construction permitting the removal of the entire base of the machine, thereby facilitating both assembly and repair. I

I'his application is a division of our original application Serial No. 131,797, iiled August 26, 1926 for improvements in adding machines.

In the drawings forming a part of this specilication:-

Fig. 1 is a longitudinal section through substantialy the middle of the machine with all parts in normal position.

Fig. 2 is the same as Fig. 1 except that the parts are shown in a possible position at the end of the forward stroke ot the operating handle.

Fig. 3 is a view of -that side of the machine best illustrating the repeat and error key mechanism when the handle is in normal position.

Fig. 4 is a view like Fig. 3 except that the parts have a possible position corresponding to the end of the forward stroke of the operating handle.

Fig. 5 is a view of that side of the machine which best shows the total key mechanism when the machine is at normal and the total key is being partially depressed.

Fig. Gis a view like Pig. 5 except that the'parts have a possible position during the operation of the machine.

ll'ig.7isaviewlookingfromtherearofthe machine with'certainpartsomittedandcertain others broken away. v l

this application April 29,

(Cl. 23S-60) Fig.-8 is a perspective key.

Fig. 9 is a perspective view of the l key. v

10 is a perspective view of the 2" numeral key.

Fig. 11 is a perspective view of a printing type showing the concave tace oi' a printing character.

'Ihe adding machine described herein is new and novel in many respects. Heretofore adding machines have followed certain general forms which may be roughly deined as resembling in appearance and mode of operation that disclosed in the patent Burroughs 504.963, September 12th, 1893. Indeed the approximate shape, size and locations of 'principal elements have been carried forward into a variety of machines ,of this class. Applicants have constructed a machine provided with a full exible keyboard, total and sub-total keys, repeat and correction keys, (printing control keys) the necessary interlocking safeguards between all keys, automatic zero-eliminating printing mechanism, and a totalizer with delayed carrying mechanism, which occupies far less volume than any machine similarly equipped. Yet the machine prints in substantially the familiar characters of familiar size;

view of the 5 numeral numeral and further, the absolute strength of theelelments entering into the construction, when considered as beams and columns, are of substantially standard or even greater strength than similar or corresponding parts found` in the familiar machines of this general class. Such construction is not merely a proportional diminution in the relative size of `elements but consists of a rearrangement of the principal working members which must act as beams or columns or both during the operation of the machine.

'Ihus the numeral keyboard is located in the front part of the machine as shown in Figs. 1 and 2. The numeral keys have relatively long shanks and are guided by suitable supports and are shaped so as to eiiect substantially maximum resistance io distortion during the operation of the machine. The actuators 106' are necessarily long members which usually act as struts or beams or both during the operation of the machine. Applicant has, by an ingenious .arrangement of the numeral key Shanks, considerably increased their relative strengths as members capable of transmitting both transverse and compressive forces which always occur in the normal operationofsuchmachineaasisclearlyshowninma l and 2. Similarly the'printing type sectors and totalizer wheel actuators are considerably foreshortened in a radial direction with a resultant equivalent capacity for resisting forces which increases in a manner depending generally linearly with length and the square of the radius of gyration of the effective resisting section. Such lncrease in strength is made manifest in a striking manner in the strength ofthe usual driving and restoring springs which, because of the much smaller momentums to be controlled, are comparatively light and therefore the frictional reactions are correspondingly smaller, and therefore the driving torque for operating the machine is also correspondingly reduced from that utilized in the now familiar machines. Such reductions have made themselves peculiarly manifest in the tot-alizing mechanism. Indeed the pinions of the totalizer have an addendum diameter less than that of the hollow supporting shaft of the corresponding elements of a machine of this ,class which is now appearing on the market. Such construction therefore preserves or even augments the capability of the working members to withstand the operating stresses and at the same time very substantially decreases the necessary driving torque of the machine while preserving a substantially customary size and form in the listed record.

'I'his construction also tends to effect large economies in manufacture, inasmuch as machines of this type are commonly constructed largely of the output of the punch press. Therefore, the corresponding punches and dies are of much lighter construction and are therefore correspondingly more ebonomically maintained.

Many parts of such ymachines as that described herein must be harden'ed so as to stand the operating stresses and strains of the machine. An unexpected and novel result in this machine is that practically all hardening of parts is completely eliminated due to the non-linear variation of strength with respect io a change in the radius of gyration of effect resisting section. It is frequently found in hardening the products of the punch press and screw machine that they warp or distort so much as to be unable to maintain accuracy, due doubtless to unbalanced internal strains resulting from the shearing stresses of the punch press orcutting or forming tools during the process of manufacture. In the standard manufacturing practice it is not unusual to first anneal such parts so as to eliminate internal strains due to manufacture before attempting to harden them. The small amount of hardening due to the internal strain during manufacture is usually amply sufficient in a machine of the size disclosed herein. Applicants are therefore able to eliminate at least two steps in the usual manufacturing practice and at the same time eliminare a large source of inspection re- Jections.

In accordance with the briey described construction the numeral keyboard is located towards the front of the machine, and the special keys such as the total, sub-total, repeat, error, etc. are suitably located at the sides of the main numeral keys. The numeral keys extend generally downwardly towards the-base of the machine, where their lower ends cooperate with lugs on the actuators 106' to govern the extent of movement of the type sectors and gear sectors. Between the actuators and the type sectors are the concentrating links 11 which reduce the spacing ofthe said actuators 106', corresponding to the numeral key spacing, to that of the printing mechanism. The type carriers 12 are of an arcuate shape with the type converging radially towards the center of the platen 13. The gear sectors 152 are exibly connected to the type carriers by suitable springs 15. The totalizer 16 is located in a cradle pivoted on the rear part of. the frame of the machine and is controlled by suitable mechanism shown in Figs. 5 and 6 for governing the times of engagement and disengagement with the gear sectors. The platen 13 is located substantially forward of the mainsupporting shaft of the type carriers and is suitably controlled from the main shaft of the machine. through its various cycles is obtained from the manually driven main shaft l7 which i". suitablyv connected, through certain mechanism to be more fully described hereinafter, to the various functioning elements for determining the proper times of operation. The printing hammers 18 are located in a suitable position for effecting a properly timed percussive blow on preselected positioned type.

M ain shaft The dierent mechanisms of the machine receive their effective movements at various times A from the oscillatory main shaft. The details of the connections from the main shaft will be described lin detail hereinafter. At this point a list, rather than a detailed description of these mechanisms, will be given. The main shaft represented by 17 is driven by the handle or manipuative device and has rigidly attached thereto certain arms, cams, cam plates etc. which will now be briefly noted.

The main shaft is adapted to positively move the actuators to aI restored or normal position and coincidentally stress certain springs for insuring forward movement of the said actuators. Near the ends of the shaft 17 and moving therewith are the plates 19, each of which is provided with a cam slot 20 (Figs. 3, 4, 5, and 6). Fitting in each cam slot is an antifriction roller 2lv mounted on a pin rigid with arms 22, one on each side of the machine, said arms 22 being framework of the machine The lower ends of said arms 22 are connected to links 24. Said links are in turn suitably connected to a universal bar 25 which is constrained to move in slots 26 in the side frames of the machine. Thus it is seen that when the shaft 17 is moved by the operator in any anticlockwise direction as visualized in Figs. 5 and 6 the universal rod 25 is moved forwardly. If the numeral keyboard has released one or more actuators 106 said actuators will under the influence of suitably positioned springs follow the sad universal bar until limited in their forward movements. On the return movement of the shaft the said universal bar 25 contacts with suitable surfaces or shoulders on the actuators and restores them to their normal positions and coincidentally restores the springs attached to sad actuators to normal position.

The main shaft is adapted to releafe any depressed numeral keys at about the time the actuated shaft reaches its home position. For accomplishing this function a spring pressed w? pe pawl 27 is pivoted on a stud 28 rigid with the said plate 19 which as noted is rigidly attached to the main shaft. Said pawl 27 is normally held in the position shown in Fig. 3 against pin 29 The power for driving the machine loosely pivoted on studs 23 attached to the main by spring 30. At near the beginning of the forward movement of the shaft 17 said pawl 27 merely rides over the projection 31 of the bell crank lever 31-32 stretching spring 30 thence returning to its initial position, but its point or working surface 33 will be below arm 31 ofI the bell crank lever 31-32 hereinbefore mentioned. 0n the return movement of said main shaft the pawl 27 contacts with the lower side of the said arm 31 (unless disabled by the repeat key) thereby rocking said bell crank 31-32 and drawing the link 34 rearwardly. Said link 34 is suitably attached to a shutter or vane 35 pivoted at 36 and 37 on the main frames of the machine. Said shutter or vane 35 has its edge in proximity to the key locking slides 38. Hence when the link is drawn rearwardly by the rocking of the bell crank 31-32 the shutter or vane 35 pushes all the key locking slides 38 rearwardly thereby releasing any depressed keys.

In order to effect the proper engaging and disengaging of the totalizer with the toothed sectors the main shaft carries a spring pressed toggle wipe pawl 181 mounted on the plate 182 which is fast to the said shaft 17. Said toggle pawl 181 cooperates with pins 178 and 179 rigid with the pivoted armll76, which in turn is connected with mechanism for rocking the totalizer cradle 44.v

Said mechanism is constructed in such a manner that the depression of the total key 185 reverses the normal mode of operation of the adding cycle. The sub-total key 192 causes the totalizer wheels to remain in engagement during the effective forward and return strokes of the main shaft, and the non-add key 203 causes the totalizer wheels to remain out of mesh on both the forward and return strokes of said shaft. This mechanism will be more fully described under the heading of totalizer timing.

In order to prevent damage to the machine, it is desirable to lock all depressed numeral keys in depressed position and underpressed keys in normal position when the machine starts to operate. This mechanism is shown in Figs. 3 and 4 and consists essentially of a shaft 48 flattened on one side which may be turned by a spring urged crank 49 rigidly attached thereto. l

The main shaft is adapted to restore the transfer mechanism and gear sectors to normal position at the end of the return stroke so that a correct totaling operation can be. had without the necessity of taking a blank stroke after adding a column of figures.

This mechanism consists of two shafts 50 and 51, each with a flattened portion, which are constructed and arranged to be given a movement at the beginning of the forward stroke of the said main, shaft. The one shaft 51 is arranged so that an oscillatory movement thereof restores the adding gear sectors 152 jto normal positionwhil the totalizer is out of mesh; and the second shaft 50 when oscillated restores the transfer mechanism including elements 52 and 53'to normal latched or cocked position. Said shafts 50 and 51 are each provided with cranks 65 and 68 (Figs. 3 and 4) connected by a pin carrying link l67. Said link 67 is adapted to be moved through the agency of the spring urged elements 68, 69 and 70 at the initial forward movement of the main shaft 17 by virtue of the projection 71 attached to said main shaft 17 coacting with the wipe pawl 70.

'Ihe main shaft is adapted to effect line spacing of the platen subsequent to the effecting of a printing operation. This mechanism consists esvided on the ends with arms 44 integrally connected by a bar 140 (Figs. 1, 2, and 7). The arms 44 are provided with openings 138 adapted to receive pivot stud screws 138' (Fig. 7) to permit the cradle to be oscillated. The upper end of the cradle carries a totalizer shaft 137 on which the totalizer wheels 16 are mounted for rotation. 'I'he cradle frame is operatively connected to link 160 (Figs. 5 and 6) to be oscillated at the proper -time in the operation of the machine. By co'n-F structing the register wheel cradle frame of a single integral part, comprising arms and an intral strengthening bar, applicants attain a certainty of rigidity and alignment whichcannot be obtained by cradles made up of a plurality of parts as has heretofore been the practice in the art.

The adding keyboard For the purpose of initiating a mechanical representation of a number or quantity to be added into the totalizer we provide a numeral keyboard which is best shown in Figs. l and 2. It will be seen that the keyboard is built up on a number of denominational units secured together and to the main frame work by the cross bars and 76 near the lower end of the one keys and near the upperv end of the "nine keys respectively. The keys are mainly supported and guided by the denominational frame 77 and the pierced strip 78 suitably secured thereto. 'Ihe denominational frame 77, best shown in Figs. 1 and 2 may be constructed of a suitably formed blank which is then bent to form suitable lugs, guides etc. for accomplishing the desired functions; thus the pierced lug 79 at the lower narrower end serves to secure the denominational frame to oneof the said cross bars 75 with a suitable securing means 80. 'Ihe lower edge of the denominational frame is in the form of a coarse comb bent at substantially right angles to the main bodv portion. The teeth 81 serve to support the key locking slide 38 and the slide 83 between which the number keys pass thus forming a crenellated flange for guiding the numeral keys and said slides 38 and 83. Certain `of thel teeth, or crenellations such as for example those between the one" and two keys, the four and "five" keys, and the eight and nine keys may be made somewhat longer on the said blank. The .extended portions 84 are then bent upwardly substantially at right angles to the said key locking slide 38. At any convenient place a tongue on the said denominational frame is formed with a double bend to form a. guide 85 for the upper discontinuous or broken edge of the said key locking slide 38. Said guide 85 may be relieved slightly at 86 to facilitate the assembly of the key locking slide with the denominational frame. At the extreme front and rear of the denominational frame 77 are portions 87 bent at right y, angles to the main body portion for more com- ,A

pletely constraining the movements of the key locking slide 38 and slide 83 in substantially a straight line. At the upper slanting edgeof the formed bent over portions between the number said denominational frame 77 are a plurality of pierced lugs 88 bent in a suitable manner to support the said pierced strip 78 in proper relation to the aforesaid lugs, guides, etc. The denominational frame may be fitted with studs or suitably keys for forming an anchorage for the keyreturning springs 89. The pierced strip 78 is formed with suitable openings for the upper ends of the numeral keys 90. It is thus seen that the numeral keys are constrained to a rectilinear motion b y the openings in the pierced strip 78 at their upper ends, by the coarse comb teeth or crenellations 81, and by the guided slides 38 and 83 at their lower ends. Said denominational frame 77 is provided with a series of projections shown as studs, for supporting the fixed supports of the springs 94 and 95, the former serving to urge the key locking slide to effective position, and the latter performing a similar function for the zero stop 96. Said frame may be skeletonized as shown for the purpose of saving weight in completed machine.

Each numerical denomination is provided with nine numeral keys 90, and each key is constructed and positioned so as to be capable of mechanically representing a digit of its denomination. The function and operation of all the numeral keys are substantially identical. Each number key as has been pointed out herein is constrained to move rectilinearly with respect to the denominational frame 77. Each key 90 is provided with an identifying cap or head 91 suitably attached to the stem or shank thereof. Each shank is provided with a pin 92 hereinbefore noticed for determining the extreme limits of its motion. Each key is provided with a suitable anchorage, illustrated as' a slotted squeeze 93 for the attachment of a spring 89 (the other end of which is attached in a suitable manner to the denominational frame 77) whichurges the key to its normal 'upward position.- Each key is provided with a pin 92' normally resting on the sloping face 89 of the key locking slide 38; 4so that when a key is depressed said slide 38 is forced rearwardlyagainst the constant urging of a suitable spring until it has reached substantially its fully depressed position whenv to form non-conflicting positive stops for deter- Ymi movement by the zero stops 96 which must bereleased by any key of the corresponding row. The extreme extent of movement of the bars 10e' is sumcienr. to cause the adding of nine into the totalizer, hence the nine"` keydoes not need to limit the travel of the corresponding bar 106. It is noted that the bars 106' travel forwardly, and for the purpose of foreshortening the case of the machine the rst two numeral keys are offset rearwardly as well as laterally for this purpose. Thus the "one" key has an offset projection extending first laterally thence rearwardly and downwardly in the vicinity of the lateral oiset of the four" key; and the two key has a similar but somewhat shorter projection extending to about the same position. Such offsetting is clearly shown in the detailed perspective'views herein designated as Figs. 9 and 10.

For the purpose of normally` restraining forward movement of the bars 106' there are provided zero stops which must be moved by any numeral key of the corresponding denominational order. Further all the zero stops must be removed from their normal positions by any total key so that the bars 106' will be limited in their forward travel by the totalizer during total taking. The zero stops 96 may be likened to a stub zero key which is normally depressed but which is raised by any other numeral key. This analogy is the more striking when it is observed that each zero stop has substantially the same shape, movement, and rectilinear constraint as the numeral keys have. The denominational frame 77 guides the vertical movement of its associated zero stop in a manner similar to the guiding of the numeral keys, and further the said stop isconflned between the key locking slide 38 and the slide 83 as are the numeral keys. .Each zero stop is provided with a pin 105 100 which fits in the cut away part 101 of the slide 83 and rests on the sloping part thereof. The slide 83 is provided with sloping faces 102 adjacent to each numeral key so that when said key is depressed said slide is forced rearwardly thus causing the pin 100 on the zero stop to elevate said stop, thus disabling said-stop and rendering the numeral key effective to limit the extent of movement of the associated slide 106. Each zero stop is provided with a pin 183 which 115 is urged downwardly by the spring 95, and since pin 100 rests on the sloping portion 101 of the slide 83 said slide is urged forwardly. When any numeral key is depressed it is held depressed for a suitable length of time by the key locking slide 38 engaging pin-92'; hence the correspending zero stop is held elevated for the same length of time. The lower end of each zero stop is suitably onset to cooperate with a suitably placed projection on the slide 106'. Each 125l zero stop is also provided with a cut out portion 105 which is utilized as an engaging. face for the upper edge of a shutter or bail 106 for elevating all the zero stops when a total key is depressed.

For the purpose of transferring the amount mechanically resented by the depressed numeral keys to t e actuators and to the totalizer there is provided a set of members known as actuators, type carriers, and gear sectors.

The actuators comprise the slides 106', one of which is provided for each denominational order of the numeral keyboard. The actuator slides 106' may be formed as a series of angle shaped members with a lower flange 106' which serves to constrain said actuators ,to a substantial rectilinear motion by connning them to the L shaped slots in the -cross tie bars 107 rigidly attached'ho to the main frame of the machine.

The forward upper edge of the actuators 106' have an uneven stepped appearance with lugs 108 integrally attached thereto. Said lugs 108 are turned over in alternate directions and form limit stops for co-operating with the lower offset ends of the numeral keys in the order shown. 'Ihus the lug designated IV limits the movement of the actuator corresponding in amount to that required to position the 4 type at the printing line and to cause the rotation of a totalizer wheel four 'teeth as shown in Fig. 2. Likewise the lug VI permits a corresponding movement to print and add six. Similarly for the remaining lugs. 4

Each actuator 106' is provided with a stud 109 to which is attached a spring 110, the other end of said spring being attached to a suitable portion of the bar25 as indicated in Figs. l and 2. Said springs normally tend to move the actuators towards the front of the machine, but such movement is normally restrained by the ecntact of face 111 of the actuators with the universal bar 25 which as was herein above noted is moved with the main shaft of the machine.

The type carriers 12 are constructed to move distances somewhat greater than that required to carry a number of teeth corresponding to the depreed key, past the totalizer wheel.' Advantage of such excess movement is taken to completely remove the type` carriers from visibility obstructing positon in front'of the printing plates when the machine is at normal, and also for the purpose of facilitating the actuatingof the transfer mechanism.

At near the rear end of the actuators 106 each of them is provided with a stud to which is connected the concentrating link 11, which in turn is attached to a concentrating lug 112 attached to the type carrying segment 12. The type carrying segments are closely spaced whereas the actuator slides 106 are comparatively widely spaced. Therefore the provision of the concentrating links and lugs. The complete assembly of these concentrating links is shown in Fig. 7, and it .will be noted that the concentrating links and lugs converge substantially equal extents from both sides of the machine thereby localizing the ktotalizer and the printing segments to substantially the middle of the frame work.

The type carriers are in the form of mutilated sectors 12 pivoted on the main frame supported rod 113 by being staked to the comparatively thick and large diameter stepped hubs 114 as shown in Fig. 1. Each type carrier is provided with a rigidly attached offset arm or lug for attachment of the concentrating link 11 and with a cupped arcuate type retaining side cover plate 113' for the numeral type 126. Fitted loosely on 'the stepped portion of the comparatively thick hub 114 is the gear sector v152 which is resiliently connected with said type carrying sector by the spring 15, the ends of which are connected to the bent over lug 115 on the gear sector and the pin 116 rigid with the type carrier/Said lug 115 is carried by an arm 117 integral with the gear sector 152 and serves the additional function of limiting theV extent'of' movementof the gear secl tor 152 in the direction of the pull of spring 15 by virtue of an interference with the pin 118 integral with the type sector.

Main frame assembly such base plate is used for squaring and dowelk locating" the main side frames of the machine. Nevertheless said side frames, are tied togetherl `zation of the adding machine here by various tie bars to more accurately locate and position said side frames. In a machine as small as this one the side frames may be tied together sumciently by the use of tie rods and bars, thereby eliminating the usual heavy base plate, `which may be replaced by a comparatively light drip pan; therefore the main frame work may be crudely likened to the chassis of an automobile.

The main side frames 1 are constructed of a suitable thickness of sheet metal and are tied` together at their lower edges by comparatively heavy angles 107 which are attached to said side frames with suitable means such as screws 3. At near the upper forward end said frames 1 are forced together by a suitable means such as a threaded tie rod 4; compressed between the said. side frames 1 by said tie rod are the series of members 77 herein denoted as the denominational frames. Said denominational frames are constructed roughly in the form. of a mutilated shallow box; each carrying one denominational row of keys; and when compressed as described they form the equivalent of a series of thick spacing and squaring plates or blocks for correctly squaring said side frames 1.

There is a set of auxiliary side frames 5 mount- 'ed towards the rear of the said main plates 1 and they are suitably secured thereto by any desirable means such as screws 7. Said auxiliary frames 5 are comparativelynear together and can be conveniently squared with each other by a comparatively heavy shouldered.rigid threaded shaft 113 tted on each side with suitable nuts 6. Said auxiliary frames 5 serve to support the major part of the closely spaced elements of the machine. The majority of said parts being supported on the said shaft 113. Hence it is seen that a comparatively light yet extremely rigid structure is attained without the use of unnecessary weight.

Since the present case is limited more especially to frame constructions and general organith disclosed. a genreal rsum of this lsubject-mat r will now be given.

The adding machine comprising the present invention is constructed and arranged with groups of mechanisms mounted between a pair of side frames comprising a left hand side plate 1, as viewed from the front of the machine and 1,25 illustrated in Figs. 14, 2, 3, 4, and 7, and a right hand plate 1' as viewed from the front of the machine and illustrated in Figs. 5 and 6. These main frame side plates extend substantially the full length of the machine with the forward end 130 oi the plates extending upwardly and being inclined forwardly at the inclination of the pierced strip '18 (Fig. 2) of the keyboard. These main frame side plates 1, and 1f are secured together by .angle cross'tie bars 10T and suitable tie rods 135 (Figs.` 1,. 2, 5, and 7) to comprise a rigid frame. The main side plates 1, 1" are cut away at the rear portion to form a mounting for auxiliary frame plates 5 and 5' illustrated in Figs 3, 4, and

'1. These auxiliary frame plates 5, 5 are L shaped o iFig.. 7) and are provided with vertical parallel portions carrying the printing type segment arms 12, the register actuating racks 152, theregister wheel cradle frame 44, the carrying mechanism arms 53, and latch arms 52 for /thecarrying 145 mechanism arms 53, (Figs. 1 and 2). The auxiliary frame 5, 5 also carries a printing platen 13 (Figs. l and 2) and paper feed mechanism for turning the printing platen (Figs. 3 and 4).

The stationary shaft 113 (Fig. 5), on which the 150 printing arms 12 and the register actuating racks 152 are mounted, is provided with shouldered ends which carry nuts 6 (Figs. 3 and 4) which act to support and anchor the vertical portions of the plates 5 in parallelism'. This auxiliary frame carrying the several units specied is adapted to be removed as an entirety by disconnecting the links 11 from the type segment arms 12 (Fig. 1) and by removing the anchoring screws 7 from the main frame side plates (Figs. 3 and 7) Keyboard mechanism comprising denominational rows of digital keys 91 (Figs. l and 2) are mounted between the forward upstanding portions of the side frames 1 and 1' to comprise the keyboard mechanism and these keys terminate at their lower ends in key stops. The keyboard mechanism is mounted as a group or unit between the upper portion of the main frame side plates in such manner that the key operated stops are adapted to control the operation of the printing type and the register mechanism by contacting with the stops on the actuator bars 106.`

Actuator bars 106 are mounted for slidable movement lengthwise of the machine in the cross bars 107, extendi between the lower portions of the side plates 1' to slide beneath the keyboard whereby suitable stops 108 on the actuator bars contact with the stops on the lower ends of depressed keys in the keyboard. These actuator bars form the third group of mechanisms of the machine.

The fourth group of mechanismsin the machine comprises the power shaft 17, the printing hammers 18, and connecting parts. These parts are mounted in the main frame side plates 1 and 1 and located relatively to the length of the machine so as to be between the keyboard and the printing type. The power shaft 17 is suitably connected with universal bar 25 for actuating and restoring the actuator bars 106.

From the foregoing, it will be observed that the present machine comprises substantially four groups of mechanisms so mounted as to be readily removable for inspection and repair. The four groups of devices comprise the following mechanisms: first, the keyboard mechanisms; second, the actuator bar mechanisms; third, the power shaft and printing hammer mechanisms, all of which are mounted between the main side plates 1 and 1. The fourth group of mechanisms comprises register wheels, the actuating racks therefor, printing type segments, and paper feed mechanism, all of which are mounted within the auxiliary frame to be removed as a unit.

The printing mechanism being located relatively to the length of the machine between the register-totalizing mechanismand the keyboard mechanism, with the printing mechanism somewhat below the maximum height of the keyboard and maximum height of the register mechanism and arranged in such manner that as soon as a record is made by the printing mechanism, the record becomes readable to the operator and results in a low compact machine of small compass.

Having described our invention we claim:-

1. In a machine of the character described, a main frame, a separable totalizer actuating section mounted on said main frame, said section comprising supporting plates, means mounted on said supporting plates for carrying a totalizer cradle, a cross rod between said supporting plates carrying a series of transfer vpawls, 'another cross rod between said supporting plates carrying a series of transfer latches, a rod provided with shouldered ends for supporting a series of type carriers and totalizing actuator sectors, and means for anchoring said side plates to said shouldered ends of said rod to maintain portions of said sid plate in substantially parallel relation.

2. In a machine of the class described, a main frame, a totalizer actuating section comprising a pair of L-shaped plates mounted in opposition to each other on said main frame, totalizer mechanism and type carrying mechanism mounted within said section, a rod extending between said plates, anchoring means for anchoring said rod to said plates to hold portions of the same substantially parallel, and a series of type carriers and totalizer actuators mounted to rotate upon said rod.

3. In a machine of the class described, a main frame comprising a pair of side plates extending substantially the full length of said machine, keyboard mechanism mounted between the upper forward portion' of said main frame side plates, a detachable auxiliary frame mounted upon the rear portion of said side plates, said detachable auxiliary frame carrying totalizing mechanism and printing type segments, actuator bars operatively connected with said type carrying segments and totalizer mechanism and slideable lengthwise in the lower portion of said side plates and beneath the keyboard mechanism, printing hammers for operating the type of the type segments mounted in said side plates between the auxiliary frame and the keyboard mechanism, and driving means operatively connected with said actuator bars and said printing hammers for actuating the totalizing and print- 110 ing type mechanisms under control of the keyboard mechanism.

4. In a machine of the class described, the combination of a pair of main frame side plates extending the full length of the machine; con- '115 necting members extending between said side plates to maintain the same substantially in rigid parallel relation to each other; a plurality o1 denominational rows of digit keys mounted between the upper forward portion of said main frame side plates; stops adapted to be positioned by said digit keys; an auxiliary frame carried by the rear portion of said main frame side plates and removable therefrom as a unit, said auxiliary frame carrying register mechanism, printing type segments and paper feed mechanism; actuator bars slidably movable in the bese of said main frame side plates and operably connected with said type segments and register mechanism; said main frame side plates being provided in their lower portion with a pair of parallel slots; a universal bar slidable in said slots and cooperating with said actuator bars: yielding means operatively connecting said unlversal bar with said actuator bars; means to cause said type segments to print; and power I means mounted on said main frame side plates and operatively connected bar.

5. In a machine of the class described, a main o frame having main side plates extending substantially the full length of said machine, keyboard mechanism comprising digital keys mounted in denominational rows and assembled as a unit and detachably mounted between the forward portion of the side plat oi' the main frame. an auxiliary. frame carrying totalizer and printing elements detachably mounted upon the rear portionof said main frame, and power actuated control bars mounted for longitudinal movement 15,;

with said universal between the lower portion of said side plates, said control bars operating beneath said keyboard mechanism to be under control thereof during adding operations, and being operatively conas a unit, said keyboard mechanism comprising key operated stops, a removable auxiliary frame carrying totalizing and printing mechanism removably mounted on the rear portion of said side plates, power operated actuator bars slid- `lably mounted between the lower portion of said side plates of the main -frame and extending beneath said keyboard mechanism, said power operated actuator bars being operatively connected with the printing and totalizing mechanism and under control of said keyboard mechanism, and power devices mounted in said main frame for operating said power operated actuated bars.

RALPH C. COXHEAD.

CHAS. W. NORTON. 

